Ok, I have tried a lot of things, and I found out that the best way to do it is to create a new activity, and extend it from ListActivity and use all the life saving methods that are already there, just waiting for us...
On Sun, Apr 1, 2012 at 8:16 PM, Ted Scott <[email protected]> wrote: > On 4/1/2012 3:19 PM, Ricardo Santos wrote: > > Hi Ted, > Maybe I have understood the theory, now, but my code still do not work. > So, my code looks like this: > > //This is my list view > > ListView charList = (ListView)findViewById(R.id.list); > > R.id.list needs to be the id of a ListView element... > > //Setting up the from String[] > > String[] from = new String[]{"name"}; > > //Setting up the to int[] > > int[] to = new int[]{R.id.lstCharacters}; > > > //Now, I set the SimpleCursorAdapter > > SimpleCursorAdapter simplCursor = new SimpleCursorAdapter(this, R.id.list, > loadCharacterCursor, from, to); > > the R.id.list should not be a ListView, it should be resource identifier > of a layout file that defines the views for each row in the list. > > //Setting the adapter do the list - here it crashes. > > charList.setAdapter(simplCursor); > > I cant see what I'm doing wrong. Can anyone shed (some) more light to > the subject? > > > I've never used a list view outside of a class extending ListActivity. > > > Ricardo > > > On Sun, Apr 1, 2012 at 12:33 AM, Ted Scott <[email protected]> wrote: > >> Hi Ricardo, >> >> First, I'm sure others will chime in if this is bad advice, but my >> understanding is that it is better to use the compatibility package and >> cursor loaders and a load manager. See >> http://developer.android.com/reference/android/widget/SimpleCursorAdapter.htmland >> the base CursorAdapter. >> >> That said, from is simply a list of columns in the PROJECTION exposed by >> the cursor that are of interest to the ListView ids in the to array. This >> is in order of the two arrays such that the data from from[x] is passed to >> the view with the id in to[x]. >> >> Given the list view row definition: >> >> <?xml version="1.0" encoding="utf-8"?> >> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"; >> android:layout_width="fill_parent" >> android:layout_height="34dp" >> android:gravity="bottom" >> android:orientation="horizontal"> >> >> <TextView xmlns:android="http://schemas.android.com/apk/res/android"; >> android:id="@+id/foo" >> android:layout_width="100dp" >> android:layout_height="30dp" >> android:textSize="16dp" >> android:gravity="center_vertical" >> android:paddingLeft="5dip" >> android:singleLine="true" >> /> >> <TextView xmlns:android="http://schemas.android.com/apk/res/android"; >> android:id="@+id/bar" >> android:layout_width="50dp" >> android:layout_height="30dp" >> android:textSize="20dp" >> android:gravity="right|center_vertical" >> android:paddingLeft="5dip" >> android:singleLine="true" >> /> >> </LinearLayout> >> >> And assuming that you have column1 and column2 in your cursor's >> projection, and want to map the contents of column1 to the textview foo and >> column2 to textview bar, from and to would be defined something like: >> >> String[] from = new String[] { "column1" , "coulmn2"}; >> int[] to = new int[] { R.id.foo , R.id.bar }; >> >> Clear as mud? >> >> -Ted >> >> >> On 3/31/2012 9:36 PM, Ricardo Santos wrote: >> >>> Hello everyone! >>> >>> I have in my application, I hace a list view that needs to be populated >>> with data from a database, I have tested my database and my app is handling >>> the data correctly, but I cant populate the list view, I have read about >>> the SimpleCursorAdapter but I cant understand how to use the class, >>> specially the from and to fields, does anyone know how to use it? >>> >>> My class is not extending ListActivity, my list view is inside a dialog. >>> >>> Ricardo >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Android Developers" group. >>> To post to this group, send email to [email protected] >>> To unsubscribe from this group, send email to >>> [email protected] >>> For more options, visit this group at >>> http://groups.google.com/group/android-developers?hl=en >>> >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to >> [email protected] >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en > > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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